Bayesian Markov chain Monte Carlo (MCMC) estimation of spatial
panel data models including Spatial Autoregressive (SAR), Spatial Durbin
Model (SDM), Spatial Error Model (SEM), Spatial Durbin Error Model (SDEM),
and Spatial Lag of X (SLX) specifications with fixed effects. Supports
convex combinations of multiple spatial weight matrices and Bayesian Model
Averaging (BMA) over subsets of weight matrices. Implements the convex
combination spatial weight matrix methodology of Debarsy and LeSage (2021)